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Finding the Fourth Proportional to 156,210, 234,386.40 and 85,026

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Solution

The fourth proportional to 156,210, 234,386.40 and 85,026 is: 127,577.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,210 : 234,386.40 = 85,026 : x
  2. Step 2: Convert to fraction form
    156,210/234,386.40 = 85,026/x
  3. Step 3: Cross multiply
    156,210x = 234,386.40 × 85,026
  4. Step 4: Simplify right side
    156,210x = 19,928,938,046.40
  5. Step 5: Solve for x
    x = 19,928,938,046.40/156,210
  6. Step 6: Final answer
    x = 127,577.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.